_=geom:Polygon:srid=4326,id:int
grid.0=POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))|0
grid.1=POLYGON((1 0, 1 1, 2 1, 2 0, 1 0))|1
grid.2=POLYGON((2 0, 2 1, 3 1, 3 0, 2 0))|2
grid.3=POLYGON((0 1, 0 2, 1 2, 1 1, 0 1))|3
grid.4=POLYGON((1 1, 1 2, 2 2, 2 1, 1 1))|4
grid.5=POLYGON((2 1, 2 2, 3 2, 3 1, 2 1))|5
grid.6=POLYGON((0 2, 0 3, 1 3, 1 2, 0 2))|6
grid.7=POLYGON((1 2, 1 3, 2 3, 2 2, 1 2))|7
grid.2=POLYGON((2 2, 2 3, 3 3, 3 2, 2 2))|8
